safety sight glass with double-layered glasses

例句：

1. 1. The company is committed to ensuring the safety of its employees.
   该公司致力于确保员工的安全。
2. 2. Safety regulations must be strictly followed in this area.
   在这个领域，安全规定必须严格遵守。
3. 3. The accident was caused by a lack of safety awareness among the workers.
   事故是由于工人缺乏安全意识引起的。